农业环境科学学报2025，Vol.44Issue(12)：3025-3040,16.DOI:10.11654/jaes.2024-1107
土壤/沉积物干湿交替关键带水位波动调控温室气体排放的氧化还原机制
Redox mechanisms by which water table fluctuations in the critical zone of soil/sediment wet-dry alternation regulate greenhouse gases emissions
摘要
Abstract
In recent years,frequent extreme climate events have led to significant fluctuations in water levels within the riparian zones of aquatic ecosystems.The varying water level heights,flooding durations,and the frequency of wet-dry cycles have a substantial impact on the emission of greenhouse gases from soils/sediments in aquatic-terrestrial ecotone.Natural organic matter(NOM),as a redox-active substance,is widely distributed in the soils/sediments of riparian zones and can drive the oxidation and reduction of elements to competitively obtain the electron sources required for the generation of greenhouse gases such as CO2 and CH4,thereby participating in the regulation of greenhouse gas emissions.Therefore,this review summarizes the current state of research on the dynamic micro-mechanisms of NOM regulating electron flow during dry-wet alternation cycles under varying water levels,as well as the corresponding changes in microbial structure and function.Furthermore,it discusses the biogeochemical coupling mechanisms by which vertical water level changes regulate the emission of greenhouse gases in riparian zones.Meanwhile,this review also explores different ecosystem models currently used for carbon cycle simulation of terrestrial water bodies and prediction of greenhouse gas emissions,and focuses on elaborating the potential advantages of the redox-based global ecosystem model.To sum up,a series of influencing factors have led to the uncertainty in carbon emission accounting in aquatic-terrestrial ecotone.关键词
水位变化/天然有机质(NOM)/氧化还原/水陆交错带/温室气体Key words
water level fluctuations/natural organic matter(NOM)/redox/aquatic-terrestrial ecotone/greenhouse gases分类
资源环境引用本文复制引用
杨承功,钱畅,汪宁欣,吴骏明,余杰予,周旭东,刘艺轩,李顺,于志国..土壤/沉积物干湿交替关键带水位波动调控温室气体排放的氧化还原机制[J].农业环境科学学报,2025,44(12):3025-3040,16.基金项目
国家自然科学基金项目(32471702)National Natural Science Foundation of China(32471702) （32471702）
